Excavating dipper



Dec. 24, 1935. p BURKE EXCAVATING DIPPER Filed oct. 7, 195s 3 Sheets-Sheet l Dec.' 24, 1935. P. BURKE EXCAVATING DIPPER Filed Oct. '7, 1933 3 Sheets-Sheet 2 Dec. 24, 1935. P. BURKE 2,025,090

EXCAVATING DIPF-ER Filed Oct. 7, 1935 3 Sheets-Sheet 3 patented Dec. 24, 193s PATENT OFFICE ExcAvATING DIPPEB.

Paul Burke, Green Bay, wis.; assignor'to Northwest Engineering Corporation, Green Bay, Wis., a corporation of Wisconsin Application October?, 1933, Serial No. 692,603

17 Claims. (Cl. 214-145) i The invention relates to dippers for excavating or dredging machines and has more'` particular reference to a novel construction which simplifies the conventional parts of the dipper resultin in a. substantial weight reduction with corresponding increase in cubic capacity.

An objectI of the invention -is to provide a dipper in which the back thereof is integrally joined with the dipper handle and which has adjustable connection with the body portion of the dipper to vary the inclination which the excavating teeth make with the handle. 4In the present construction clamping or bolting of the dipper handle to the back is therefore eliminated with the elimination also of all local duplication of weight so that the volume capacity can be correspondingly increased.

A further object is to provide a dipper in which the back thereof connects with the dipper handle by means of a plurality of plates secured as by welding to each other, and in which the back' is secured to the sides of the dipper body by means`A of detachable securing pins so that the angle which the excavating teeth make with the handle may be altered to suit different conditions.

Another object is to provide a dipper in which the back is adjustable with respectto the sides of the dipper and wherein thev sides are each provided with an extension for hingedly mounting a door on the body. y -V A further object is to provide a dipper in which the body has a plurality of angular adjustments with respect to the back with the latter having a dipper door hingedly mounted thereon for association with the body.

A further object is to provide a dipper of sturdy and rugged construction and which will fulfill all requirements of service and manufacture.

With these and other objects in view, the invention may consist of certain novel features of construction and operation, as will be more fully described and particularly pointed out in the specication, drawings and claims appended hereto.

l In the drawingsv which illustrate an embodi ment of the device land. wherein like reference characters are used to designate like parts- Figure 1 is a vertical sectional view taken to one side of the center of the dipper showing the same constructed in accc iance with the present invention; l

Figure 2 is a front elevation view of the dipper shown in Figure 1;

Figure 3 is a rear elevational view of the dipper with a section of the door broken away to show p' the' pivotal connection of the back with the dipper sides;

Figure 4 is a view similar to Figure l but showing the dipper in a different position of inclina- 5 tion with respect to the handle;

Figure 5 is ahorizontal sectional view taken substantially on line 5--5 of Figure 3 `and showing the dipper back in plan;

`stantially along line B--E of Figure 1;

Figure 'l is a detail sectional view taken sub-v stantially along line I-'l of Figure 4; and

Figure 8 is a vertical sectional view takenon a plane passing through the securing means for ad- 1 justably uniting the dipper back with the body and showing lstructure yfor hingedly mounting the door to the back. y l

Referring to the drawings the dipper comprises an integral body portion providing sides I and II which merge into a dipper front I2 carrying at itsforward end a plurality of excavating teeth formed by the Shanks I3 each having a detachable .dipper tooth I4. The body portion is'of any suitable material such as manganese steel of the required thickness and which tapers at I along the forward edge to a reduced thickness as shown -in Figure 2. l On the upper edge of the sides of the body portion are formed bosses I6, Figure 6, and extensions l1, Figure 7, the former providing 3 means for securing the dipper side to the handle as will be more particularly described, while the extensions I1 rare bifurcated for receiving the sup-V porting ribs of the dipper door, thus pivotally securing the door to the body portion.

The dipper door is formed of a one piece cast- 35 ing shaped to provide a concavity on the side positioned adjacent the body portion and having an arcuate portion of determined curvature at its upper end to provide a ange 2li disposed substantially parallel with the dipper front. a On the outside of the door are provided reinforcing ribs 2| and the supporting ribs 22, a supporting rib being located adjacent each side edge of the door and projecting beyond the flange 2J) for pivotal connection by means of the pins l23 to the bifurcated extensions II. The central reinforc- ,ing rib 2I slidably receives the latch 24 which projects beyond the door for connection with the keeper 25 formed integral with the dipper front I2. The latch 24 is operated to withdraw the end thereof from the keeper by means of a lever 2B pivotally connecting therewith and which lever is pivotally supported at 21 by the adjustable.

bracket 28. The outer end of the lever is adapted to engage the boss 29 for limiting the rotation thereof when the keeper is being withdrawn.

The invention provides an adjustable connecftion between thedipper backformed by the plate 30 and the body portion of the dipper in order that the excavating teeth I4 may have different positions of inclination with respect to the dipper handle. An additional feature of the invention is the rigid connection of the dipper handle with the back which structure will now be described.

'I'he handle is formed of a pair of sticks, preferably of hollow construction, each having a front wall 3|, a rear wall 32 and inner and outer side walls 33 and 34, respectively. A plate 52 is secured by Welding to each stick respectively and to the dipper back 30, providing supporting surfaces for the bail lugs 35 likewise welded to the upper surface of the back 30 and to the plate 52, which plate in effect forms a continuation of the inner wall of the dipper stick. The dipper sticks are spaced and thus space the lugs 35 which receive the-bail 36 pivotally connecting therewithby means of pin 31. The dead end of a cable 38 is tid to the bail by which the dipper is lifted in the act of digging. The front wall 3| of each stick terminates short of the plate and has welded thereto' a front plate 40 of substantially trapezoidal shape, the weld between th'e wall of the plate being reinforced by welding' thereto the m'etal strip 4 I.

As the plate is welded at its base to the surface of the dipper back 30 the same in effect provides a continuation of wall 3|, materially increasing the strength of the joint by the additional width of the base of the plate. The outer wall 34 of each dipper stick likewise has welded to its terminal end a side plate 42 of trapezoidal shape, the weld between the plate and wall being reinforced by the strip 43. This plate may form a continuation of its companion plate 40 or may comprise a separate plate, in which case their common edge is welded to make for a securey union. As more clearly shown in Figures 5, 6 and 7 the lower edge of each side plate42 depends below the plate 38 and is located Within the side members I0 and II of the body portion.

y Welded to the inside of each plate 42 at the respective sides thereof are reinforcing plates 53 and 54, each reinforcing plate and also plate 42 being suitably welded to form a secure union with plate 30 forming the back of the dipper. Plates 53 and 54 strengthen their respective plate 42 and have acontour at their base similar to that of the plate, extending upwardly a distance above the dipper back as shown in Figures 6 and 7.

Each reinforcing plate 53 lis apertured as is also plate 42, which opening is aligned with opening in boss I6 for receiving the securing bolt 46 pivotally luniting' in this manner the respective dipper sides to the dipper back. Each plate 54 is likewise apertured, the opening extending through plate 42 for association with the several pairs of openings 41 and 48 formed in the boss I1 on the sides of the body. The securing bolts are located in the aligned apertures to secure the dipper body and back in the several positions of adjustment. It will be noted that with the lower pair of apertures 41 aligned with those provided by plate 42 and the reinforcing plate 54 the dipper has the inclination of Figure 1, while in Figure 4 the rear of the bodyportion has been in effect lowered to align the upper pair of apertures l48. With the parts united by securing bolts 49 in this position the angle of inclination which the excavating teeth make with the dipper handle is greater than that of Figure 1, so that the structure permits adjustment of the body portion in order to varyv this inclination to suit different conditions.

Completing the connection between each dipper stick and the back is a rear plate 55 extending from wall 32 and being welded thereto and along its sides toits respective plates 42 and 52.4 It may be here noted that each plate 52 is suitably welded along its other edge to a front plate 40 So that it may be said that each stick is securely united to the dipper back in fixed relation thereto. The sticks are joined at a point well above the dipper back by the transverse plates 55 Welded to each other and having their abutting ends welded to the inside wall 33 of the sticks.

The detachable securing ,means provides for uniting the dipper body with the back, with the body in various positions of adjustment with respect thereto, and since the back and dipper sticks are in effect one the body therefore has various positions of inclination with the sticks; As the door I8 is hingedly secured to extension I1 on the respective side members of the body the dipper back is located in various positions with respect thereto and in order that the same may at all times have association with the upper edge of thedoor the invention provides a built-up flange 51 welded to the left hand edge of the plate 30 and confined between the plates 52. The flange extends the full width of the -back and as shown in Figure ,1 has association with the upper edge of the door I8 which edge is provided with an upstanding boss 58. When the dipper body and back are in the position shown in Figure 4 the upperI edge of the door, by means of the boss 58, is associated with the dipper back so that in both positions of adjustment of the dipper body the door in closed position provides an effective closure therefor.

The invention is not restricted to the pivotal mounting of the dipper door to the sides of the `body but is to be considered as covering a m'odified construction in which the dipper door has pivotal securement to the dipper back as shown Y in Figure 8. The portion of plate 42 in the vicinity of the reinforcing plate 54 is further reinforced by a triangular metal block 60 suitably secured as by welding to the exteriorof the plate 42. The respective rib 22 of the door is pivotally mounted to the block, plate 42 and the inside platel 52 by a pivot pin 62 of tapering formation which is held in place by a securing nut 63 having threaded connection with the end projecting beyond the inside plate. It will be noted that for the purpose of providing a vertical bearing surface for the securing nut the base portion of plate 52 is bent to extend vertically in the vicinity of the reinforcing plate 54. A metal strip 64 is added to the exterior thereof above the flange 51 for strengthening purposes, the same being united to plate 52 by welding. As the triangular block 68 provides a vertical exterior surface, and which has projecting at right angles thereto the pivot pin 62, it will be seen that thev ribs 22 of the door, suitably extended for the purpose, may

be mounted on the pivot pin` and thus suspended for free pivotal movement from the dipper back.

. Angular adjustment of the-dipper body'with respectthereto is possible as heretofore described although a change in the position ofthe dipper body will necessitate a change also in the hinging of the door on the dipper back. Accordingly, a

second opening 6I is provided in metal block 60 15 in spaced relation to pivot pin 62 and which is tapered to receive said pin to lower the hinge connection of the door a distance equal to the change in the position of the dipper body.

An excavating dipper constructed in accordance with the invention is considerably reduced in weight due to the rigid connection 'of the dipper handle with the dipper back. 'I'he arrangement of .plates welded to each other, to the dipper sticks and back eliminates considerable weight, with the result that the volume capacity of the dippers is correspondingly increased. This result is secured without any sacriiice instrength or rigidity of the connectingv parts while an added advantage is secured in the detachable connection between the back and the dipper body whereby the latter may' be secured in various positions of inclination with respect to the handle.

It is to be understood that I do not wish to be limited by 4the exact embodiment of the device shown, which is merelyOby way of illustration and not limitation, as various and other forms of the device will of course be apparent to those skilled in the art Without' departing from the spirit of the invention or the scope of the claims.

1,. In a dipper for excavating, dredging and the base thereof providing the front of the dipper y and the legs ,forming the side members of the dipper, a back for the body secured to the side members, and a hifurcated4 extension formed on the end of each of said side members for pivotally securing a door to the body.

3. In a dipper for excavating, dredging and similar machines, a dipper body formed by a.

. member of substantially U-shaped cross section,

the base .thereof providingy thae front ci the dipper and the legs forming' the side members of' the dipper, a back for the body secured to the side members, a.v handle rigidly secured to the back,

and means formed on'ithe end of each of said members to one side thereof for pivotally securing a door to the body.

4. In a dipperior excavating, dredging and similar machines, a dipper body formed by a member substantially U-shaped in cross section, the base thereof providing the front of the dipper and the legs forming the side members of the dippena back for the body formed by a plate detachably secured to the side members, a handle rigidly secured to the plate, and an extension onv each side member for hingedly mounting a door to the body. J

5. In a dipper for excavating, dredging and similar machines, a yclipper body formed by a nember substantially U-shaped in cross section, a plate forming the back of the dipper, a handle for `the dipper, means welded to the handle and plate for unitingA the parts, said means depending from the plate and being secured to the sides' of the member. L l

6. ,In a dipper for excavating, dredging and similar machines, a dipper body` providing side members, a plate forming the back of the dipper,`

dipper sticks providing the handle of the dipper, and a plurality of plates welded to the sticks andback to iixedly unite thesticks thereto, certain of said plates depending below the dipper back and being secured to the side members.

I 7. In a dipper forA excavating, dredging and similar machines, a dipper body providing side members and having a door hingedly secured thereto, a plate forming the back of the dipper. dipper sticks providing the handle of the dipper, 10 and a plurality of plates welded to the sticks and back to nxedly unite the sticks thereto, certain of said plates depending below the dipper back and being secured to the side members.

8. In a dipper for excavating, dredging and l5 similar machines, a dipper body providing side members, said members having bifurcated extensions for hingedly mounting a door, a plate forming the back of the dipper, a pair of dipper sticks providing the handle of the dipper, and a plural- 20 ity of plates welded to the, back and to each stick to lxedly unite the back to the sticks, certain of said plates depending below the dipper'back and being detachably secured to the side members. 25

9. In a dipper for, excavating, Adredging and similar machines, a dipper body having a door pivotally secured thereto, a. dipper handle having,

a yplate rigid therewith providing the back of the dipper, securing means for detachably uniting the back to the sides of the body in various positions ofadjustment, anda flange on thedipperback for association with the door in said various positions oi adjustment of the back withv the dipper body.

10. In a dipper for excavating, dredging and 'similar machines, a dipper body having a door pivotally secured thereto, a vdipper handle having a plate rigid therewith providing the back of the dipper, securing means for detachably uniting the 40 l back to ,the sides of the body in various positions of adjustment, and a built-up ange welded to the dipper back, said iiange having association lWith the upper edge of the door in said various positions of adjustment of 4the back with the'45 dipper body.

1l. In a dipper for excavating, dredging and similar machines, a'. dipper .body having a door pivotallyisecured'thereto, a dipper handle having means integral therewith providing the back of y the dipper, and securing means for detachably uniting the back to the sides of the body, certain of said means having different positions of loca-v l tion in the sides of the body to vary the inclination of the body with the dipper handle. i l2. In a dipper for excavating, dredging and' similar machines, a dipper body, a dipper handle having a plate rigid therewith providing the back y of the dipper, securing means for detachably uniting the back to the sides of the body in various positions of adjustment, and means fixed to the back of the dipper for pivotally securing a dipper door thereto.

13. In a dipper for excavating, dredging and similar machines, a dipper body, a dipper handie having means integral' therewith providing the back of the dipper, securing means for detachably uniting the back to the sides of the body, certain of said securing means having different positions of location in the sides of the body to vary the inclination of the body with the dipper handle, and a pivot pin iixed to the dipper back for pivotally securing a dipper door thereto, said pin having different positions of location in the 15 dipper back to vary the position of the door to accord with the adjustment of the dipper body. 14. In a. dipper for excavating, dredging and similar machines, a dipper body having side members, a plate'forming the back of the dipper, dipper sticks providing the handle of the dipper and having plate members welded thereto and to the back to ilxedly unite the handle and back of the dipper, certain of said plates depending below the back for detachably securing the dipper body in various positions of adjustment with respect to the handle, and means xed to the back for pivotally securing a dipper door thereto.

15. In a dipper for excavating, dredging and similar machines, a dipper body having side members, a plate forming the back of the dipper, dipper sticks providing (the handle of the dipper 'and having plate members welded thereto and to the back to xedly unite the handle and back of the dippencertain of said plates depending below the back for detachably securing the dipper body in various positions of adjustment with respect to the handle, and a pivot stud detachably secured to the dipper back for pivotally securing a door thereto, said stud having different positions of location in the back to vary the position of the door to accord with the adjustment of the body.

16. In a dipper for excavating, dredging and similar machines, a dipper body of substantially U-shape in cross section, the base thereof providing the front of the dipper and the legs forming the side members of the dipper, a dipper handle having a plate xed to the end thereof providing the -back of the dipper, means securing the body to the back in a plurality of adjusted positions with respect to the handle, and a pivot stud carried by the back for pivotally securing a door thereto, the position of said Stud being adjustable to accord with the various positions of adjustment of the body.

17. In a dipper for excavating, dredging and similar machines, a dipper body, a dipper handle having means rigid therewith providing the back of the dipper, and securing means for detachably uniting the back to the sides of the 20' body, certain of said means having different positions of location with respect to the body to vary the inclination of the body with the dipper handle.

PAUL BURKE. 25 

